JPH0542565B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for reinforcing square steel pipe members such as joints between columns or columns and beams in architectural structures made of square steel pipe columns.

[Problem that the invention seeks to solve]

When joining columns or columns or beams in architectural structures that use rectangular steel pipes with closed sections as columns, reinforcing metal fittings are attached to the inner surface of the columns and joint fittings are attached to the outer surface of the columns to compensate for the column cross sections. It is often necessary to insert a bolt that passes through the column from the inside surface.

However, in the case of a square steel pipe column with a closed cross section, it is difficult to insert reinforcing metal fittings and bolts into the column.

This invention has been developed to address the above-mentioned problems.

[Means for solving problems]

This invention uses a jig in which a mounting rod protrudes in a criss-cross shape from a support rod with a bent part formed in the middle to provide elasticity, and the mounting rod of the jig has a plurality of outer surfaces in contact with the inner surface of a square steel pipe member at the tip of the mounting rod. At the same time, a reinforcing metal fitting having a shape is attached and inserted into the square steel pipe member, a bolt is suspended inside the square steel pipe member, and the bolt is pulled out from the bolt insertion hole using a pull-out jig to remove the reinforcement from inside the square steel pipe member. This is a method of reinforcing a square steel pipe member in which a bolt is inserted into a metal fitting or a square steel pipe member, and a nut is screwed onto the bolt from the outside of the square steel pipe member and tightened.

〔Example〕

The details of this invention will be explained based on illustrated embodiments.

First, when inserting the reinforcing metal fitting a having a plurality of outer surfaces in contact with the inner surface of a square steel pipe member, mounting rods 2 are provided protruding in four cross-shaped directions from a support rod 1 made of angle material, and a required number of mounting rods 2 are inserted. has a bent part 3 in the middle
is formed, giving it elasticity. A reinforcing metal fitting a is temporarily fixed to the tip of the mounting rod 2 with screws or the like.

The reinforcing metal fitting a is inserted into the square steel pipe member A using the jig configured as described above. Since the mounting rod 2 is given elasticity by the bent portion 3, the reinforcing metal fitting a can be easily inserted into the square steel pipe member A and can be brought into pressure contact with the inner surface.

Next, the bolt b is suspended inside the square steel pipe member A by a thread 4, etc., and the reinforcing metal fitting is removed from inside the square steel pipe member A by pulling out the bolt b from the bolt insertion hole using a jig such as a magnetic rod 5 or a hook bar 6. Insert bolt b into square steel pipe member A, and attach nut 7 to bolt b.
Screw and tighten.

FIG. 7 and subsequent figures show another example of means for pulling out the bolt from the bolt insertion hole. Then, a cone-shaped tip material 8 made of plastic, a piece of wood, etc. is temporarily attached to the tip of the bolt b, and a pilot cone 9 is attached to the tip with a string, and the bolt b and the pilot cone 9 are inserted into the square steel pipe member A. First, the awl 9 can be used to pull out the magnetic rod 5 or the hook rod 6 from the bolt insertion hole, and then the bolt b can be pulled out from the bolt insertion hole.

〔Effect of the invention〕

The present invention has the above configuration, and when joining columns or columns and beams made of square steel pipe members, reinforcing metal fittings having a plurality of outer surfaces in contact with the inner surfaces of the square steel pipe members are attached inside the joint. This allows for the use of relatively thin-walled steel pipes. Further, since the joining bolt is inserted from the inside of the square steel pipe member and the nut is screwed together from the outside of the square steel pipe member, tightening work such as screwing the nut together on site becomes easy.

[Brief explanation of the drawing]

Figures 1 and 2 are plan views of reinforcing metal fittings being inserted with a jig, Figure 3 is a perspective view showing the outline thereof,
Figures 4, 5, and 6 are cross-sectional views of the bolt being pulled out from the bolt insertion hole, Figure 7 is a side view showing the means for pulling out the bolt, and Figures 8, 9, and 10 are FIG. 3 is a cross-sectional view showing an outline of the bolt drawing process. 1...Supporting rod, 2...Mounting rod, 3...Bending part,
4...Thread, 5...Magnetic bar, 6...Hook bar, 7...
Nut, 8... tip material, 9... drill, A... square steel pipe member, a... reinforcing metal fitting, b... bolt.

Claims (1)

[Claims] 1 Using a jig with a cross-shaped mounting rod protruding from the support rod with a bent part formed in the middle to give elasticity,
Attach a reinforcing metal fitting with multiple outer surfaces in contact with the inner surface of the square steel pipe member to the tip of the mounting rod of the jig, insert it into the square steel pipe member, and insert the bolt into the reinforcing metal fitting and the square steel pipe member from the inner side of the square steel pipe member. A method for reinforcing a square steel pipe member, comprising tightening a nut onto the bolt from the outer surface of the square steel pipe member.